/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using NUnit.Framework;
using Spring.Context.Support;
using Spring.Expressions;
using Spring.Validation.Actions;

namespace Spring.Validation.Validators;

/// <summary>
/// Unit tests for the ConditionValidator class.
/// </summary>
/// <author>Rick Evans</author>
[TestFixture]
public sealed class ConditionValidatorTests
{
    [Test]
    public void StraightTrue()
    {
        ConditionValidator validator = new ConditionValidator();
        validator.Test = Expression.Parse("true");
        Assert.IsTrue(validator.Validate(null, new ValidationErrors()));
    }

    [Test]
    public void StraightFalse()
    {
        ConditionValidator validator = new ConditionValidator("false", null);
        Assert.IsFalse(validator.Validate(null, new ValidationErrors()));
    }

    [Test]
    public void TrueScalarExpression()
    {
        Inventor tesla = new Inventor();
        tesla.Name = "Nikola Tesla";

        ConditionValidator validator = new ConditionValidator(Expression.Parse("Name == 'Nikola Tesla'"), null);
        Assert.IsTrue(validator.Validate(tesla, new ValidationErrors()));
    }

    [Test]
    public void FalseScalarExpression()
    {
        Inventor tesla = new Inventor();
        tesla.Name = "Soltan Gris";

        ConditionValidator validator = new ConditionValidator(Expression.Parse("Name == 'Nikola Tesla'"), null);
        validator.Actions = new ErrorMessageAction[] { new ErrorMessageAction("Wrong name", "InventorValidator") };
        IValidationErrors errors = new ValidationErrors();
        Assert.IsFalse(validator.Validate(tesla, errors));
        Assert.IsFalse(errors.IsEmpty);
        IList<string> namedErrors = errors.GetResolvedErrors("InventorValidator", new NullMessageSource());
        Assert.AreEqual(1, namedErrors.Count);
        string error = (string) namedErrors[0];
        Assert.AreEqual("Wrong name", error);
    }

    [Test]
    public void WhenValidatorIsNotEvaluatedBecauseWhenExpressionReturnsFalse()
    {
        ConditionValidator validator = new ConditionValidator();
        validator.Test = Expression.Parse("false");
        validator.When = Expression.Parse("false");
        IValidationErrors errors = new ValidationErrors();

        bool valid = validator.Validate(new object(), null, errors);

        Assert.IsTrue(valid, "Validation should succeed when condition validator is not evaluated.");
        Assert.AreEqual(0, errors.GetErrors("errors").Count);
    }
}
